Combined type-writing and computing machine.



O. W. OLMSTED.

COMBINED TYPE WRlTl-NG AND, COMPUTING MACHINE.

APPLICATlON FILED (1013, 1912 1,268,605. 4 Patented J une 4, 1918.

unnuunpn Q U Q.

X FE INVENTUR:

? @Anww WWW" I BY ATTORIQYI UNITED STATES PATENT OFFICE.

. OSMOND W. OLMSTED, OF HARTFORD, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO UNDEBWOOD COMPUTING MACHINE COMPANY, OF NEW YORK, N. Y., A

CORPORATION OF NEW YORK.

COMBINED TYPE-WRITING AND COMPUTING MACHINE.

Application filed October 3,

- To all whom it may concern:

Be it known that I, Osnonn W. Omns'rnn, a citizen of the United States, residing in Hartford, in the county of .Hartford and State of Connecticut, have in- 1 vented certain new and useful Improvements in Combined Type-Writing and Computin Machines, which the following is a speci cation.

This invention relates to a computation accumulating set of a type useful in connection with the Hanson computing machine such as that described in Patent No.

905,421, dated December 1, 1908.

In the Hanson machine above mentioned, pins representing digits are set up or indexed on rack bars to afford a preliminary representation of a computation, whereby the extent which these rack bars will subsequently rotate the computing or dial wheels is determined.

A feature of this invention is to provide a new method of setting or indexing the pins or other digit-representing elements whereby a simple and compact structure is afiorded, whic occupies a minimum of space and acts with a minimum of move-- ment. 7

A further feature of this invention is the improvement in the means for retaining the ins on the rack bars so that they will not ecome accidentally disengaged therefrom no matter in what position the bar is held.

In carrying out. these and further features, the pins are provided with cam surfaces, and swinging linkages are provided with cam lugsarranged' to cam down-by a transverse movement the apposite pin on any one of the pin bars which happens to be raised. The pins are held from coming out of their sockets in each of the bars by a retaining flange common to all of the pins on a bar and entering into a cut-out ortion to engage a shoulder. This flange a so de- Specification of Letters Patent.

1912. Serial No. 723,677.

raised position ready to have one of the pins thereon set by one of the pin-setting lmkages.

Patented June 4, 1918.

Fig. 2 is an enlarged fragmentary view similar to Fig. 1, showing the pin-setting linkage after having been actuated to depress one of the pins.

Fi 3 is a skeleton perspective view, showing the relative arrangement of one of the pin-bearing rack bars and one of the pin-setting linkages' Referring more particularly to the separate arts of this invention as \embodied in the orm shown ih the drawings, 1 indicates a column or order member shown in the form of a rack bar having a rack 2 at its forward end arranged to mesh with a pinion 3 connected" to rotate a computing or dial wheel 4. As described in the abovementioned patent, a series of bars '1 are arranged side by side and are ada ted to rotate the accordant computing w eels of a vseries arranged side by side, variable amounts according to which one of a series of digit-representing members5, shown in the form of pins suitably mounted on the rack bars, is set or indexed. There are a number of the ins 5 on each rack bar 1, in fact one less t an the exchange value between the order which the particular rack bar represents and the next higher order, this being in the case of the decimal system nine pins. Each of the pins 5 is mounted in a vertical socket 6 so as to be capable of being moved from the raised or normal position shown in Fig. 1 to the depressed or indexing position shown in the case of the pin farthest to theleft in Fig. 2. To retain the pins-5 in. either adjusted position, they are each provided with one or; more annular rooves, preferably in this case two 7, 8-,wh1ch are enga bya s rin pressed ball9 so as to yiel ingly hold tl e associated pin against accide al movement. The pins 4 are prevented om falling throu h and out at the bottom of the socket 6 by going each provided with an enlargement or head 10 forming a shoulder which enga es that portion of the bar 1 surroundt e socket 6 in each case.

n order to revent the pins from being forced up and out of the socket 6 or in case the bar should be inverted to prevent the pins from falling out of the socket, there is provided a retainer 11 shown in the form of an elongated angular flange secured lengthwise of the bar 1 in any suitable manner as by being riveted thereto, and having one arm of the flange projecting over shoulders 12 formed on all of the pins by having the head cut away at one side. This forms a retaining means common to all of the pins, which limits their upward movements, and thus prevents them from being forced up entirely out of the sockets 6.

For the. purpose of setting the pins on the rack bars 1 the latter are raised seriatim in accordance with their denomination or order by mechanism not shown but represented by fingers l3. ll/hen a pin-bearing rack bar is raised one of its pins will be set or depressed below its tellows by any one of a series of pin-setting linkages 14: which are operated by associated ones of a set of numeral keys 15. To accomplish this. each of the numeral keys 15 is provided with a thrust rod 16 which, when the connected numeral key is depressed, will rock the assoc'ated bell crank 17 by engaging with one arm 18 thereof. This bell crank 18 has another arm 19 which is bifurcated to engage a wrist 20 on the associated one of a series of links 'The link 21 in each case is pivotally connected at its opposite ends to levers 22 and 23 which are pivotally mounted intermediate their ends and connectecl to ether at their 0 osite ends bv means of a spring 25 which holds one of the levers 23 against a stop 26. llhcn one of the pin bars is raised to the position indicated by the bar l in Fig. 1, it will bring all oil the 5 thereon into the path of series of lugs or projections 27 on the lower linlrs 24 ot the pin-setting linkages l i, so that when any one of the numeral lreys 15 is actuated and the associated linkage roclred so as to produce a transverse or horizontal movement of the lower link 24, one of the projections or lugs 27 will come in contact with the apposite pin 5. Each of the linlrs 2% is provided with a series of these lugs or projections 27, in fact one for each order or column bar 1, and they are made in the form of cam-shaped teeth so that the sides approaching the pins during the initial longitudinal 'movement of the linlr; 24: will cam down any raised pins. Uzi course, in actual practice, only one pin bar will be raised and only one linkage letoperated, so that h this cross selection only one cam tooth will be in action, and thus only one pin depressed at a time.

The pins 5 may be each provided with a aeaeoe cam surface 28 facing the cam surface of the apposite tooth or lug 27 so as to in crease thecani action. In such a case, the cut-out portion of the pins will be provided with a Hat face as shown, so that the retainer 11 not only acts as a retaining means, but also as a guard to prevent a rotary motion of the pins, thus maintaining the cam surface thereof always in proper relation with the cam surfaces of the lugs on the linkages.

The rack bars may be held against transverse movement due to the transverse thrust in camming down the pins by one or more guides 30 suitably located to take up the strain.

The operation of the device will be readily understood from the above description. Each of the bars 1 is raised scrz'atim, in accordance with their order or denomination, and one of the numeral keys l5 struck for a digit to be computed in the column corresponding to the order bar raised. The lrey will rock the associated one of the linkages 1 so that the lower link 911i: thereof will be given a transverse horizontal movement, bringing the proper one of the camlugs 27 into engagement with the apposite pin 5 on the raised order bar. The pin thus engaged will be rammed down vertically, below its fellows, so that it will form an obstruction in the path of a general operator 29, which when subsequently operated will advance the rack bar 1 an amount corresponding to the particular pin set, the rack bar turn rotating the computing wheel 4 a corresponding amount.

The head 10 determines the extent of downward movement of the pin 5 in each case, and the flange ll determines the er:- tent of upward movement of all of the pins on a rack bar. Each individual pin is held against accidental displacement in both positions by the ball and socket detent.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, T claim:

1. The combination with a carrier, of a digitrepresenting element on said carrier settable from normal to indexing position and having a cutout portion, and a member on said carrier having a projection engaging in such portion to hold said element against rotation, and to limit its movement in one direction.

2. The combination with a member, of a digit-representing element mounted on said member and settable from normal to indelring position. said element having a shoulder engaging said member to determine the limit of movementof said element in one direction, a flange on said member engaging said element to determine the limit of movement lid lib

ill]

lllEJ and a member on said carrier engageable with said element to limit its movement in one direction and to hold it against rotation during its movement.

- 18. The combination with a carrier, of a digit-representing element on said carrier settable from normal to indexing position, a linkage having a cam surface thereon arranged to engage said element to set the same, and means for constantly maintaining said element in eflective position with relation to said cam surface.

'19. The combination with a carrier, of a digit-representing element on said carrier settable from normal to indexing position, a

linlntge having a cam surface thereon arranged to engage said element to set the same, and a member engageable with said element to constantly maintain it in cfiective position with reiation'to said cam surface and to limit its movement in one direction.

92th The combination with a carrier, of a digit-representing element on said carrier having a portion cutout said element being settable from normal to indexing position, a linkage having a cam surface arranged to engage said element to set the same, and amember engaging in said cut-out nortion to constantly hold said element against rotation, whereby said element is constantly anemone maintained in efiective position with relation to said cam surface; 1

21. The combination with a carrier, of a digit-representing element on said carrier settable from normal to indexing position,

said element having a cam surface, a linkranged in rows and means for raising any bar, of a camming member universalto all of the pins of a row and arranged to set up from normal to indexing position any one which happens to be raised above its fellows, by a motion transverse to the direction in which said bars extend and to the direction of setting movement of the pin set, and guides for holding the bar, Whereon the set pin is mounted, against transverse movement during the setting operation.

7 @SMOND W ULMSTED,

Witnesses:

WM. T, Montana,

Tnomas. 

